Control valve for humidifying units



Jan. 27, E. BUEHRER CONTROL VALVE FOR HUMIDIFYING UNITS Filed Nov. 26, 1928' Patented Jan. 27, 1931 i V UNITED STATESPA T ENT QFEICE EMIL BUEHRER; or career; Av, scons n CONTROL VALV FQR HUMIDIFYINGI'UNITS Application filed November sea-192s. Serial No. 322,069,

r This invention relates tova control valve for :Figure 8c is a view corresponding to Figure humidifying units. 2 showing ainodified form of construction.

Objects of this invention are to, provide a Referring to the drawings, particularly control valve construction 'for humidifying Figures land 2, it will be seen that a furnace 5 units such as that disclosed in my U. S. Patshell is indicated in dotted lines by reference 55 cut #1,6l8,537 of November 8, 1927, for Character 1',-the furnace by reference charac- Hulnid-ifier for heating unit. ter 2 and water pan byreference'character Furtheriobjects are to provide, a control 3. This water pan rests directly upon the valve in which the heat; adjacent the water furnace head as described in my above noted l pan with which the valve is associated does patent and is provided with athreaded ap- 60 t d t i t th parts f th l t crture below the upper edge of the pan and which the vajlvepartsare readily accessible into which a. discharge pipe 4 is screwed. outside of the furnace or'device withwhich This pipe projects outwardly through the th iti f mt d, d j which aniovershell of the furnace and carries the con- 1 HOW is provided for the'val ve so that the trol valve. The water pan isprovided with liquid level cannot rise beyqnd a; redetera bracket 5 upon WlliCll'lS hingedlycarried mined point,"so that there is no chance of a short lever 6, rigidly'attached to a rod 7 Overflow f th t r pan, which carries the float 8. The lever v6 has'its Further objects are to provide avalve 30n- VlOWBP 611d pivotally attached to one end Of struct-ion in which a. valve is carrigd by an ad the control I'OCl' 9', which projects tllIOllgll. Y

justabl e, sleeve Q11 oneside' of a alve seat, the pipe 1. The CO-IItIOl rod 9- is preferably and in which a control rod xt nd thr ugh of hexagonal shape as indicated] in the drawan elongated pipe and is loc t the other ing' and its outer end is provided with a reside ofthe valve. seat and'is adapted to unduced extension 10, which is preferably seat the valve, such valve being wholly dis-, equipped with a beveled outer face as shown F" tinct and independent of the control rod and lm l'ticularly in Figure 2. -f thug h yi th v bilit t it lf hid The outer end-of the pipe 4- has screwed endcnt ly n oti'on of the 'cgnt ol rod tlllll'QOll' t1- casing lVlllCh is provided *Wlbll soth at the most accurate seating under all a threaded projecting end through wilfiich' a diti i bt i d] 1 screw tl'lrcaded sleeve 12 passes. The screw I I i-th' bbjQ t f fie t id w t threaded sleeve'is provided with a lock nut v tiwo'nin whichithe Skew, the i h: ligand theouter end oi the sleeve 12 is proconytiains h l b b dil dj t bl vlded wlth ahexagon face 14 adapted to re ith reference t i or wi reference ce vea wrench. The casing 11v 1s provided .to the control rod, so'tha t the point atwhich W a fi l p nms l5llocated' abqve 85 Mthetcvalve opecnspr, t ff may be d u its central axis'into'vhlc-han overflow p pe with the utmost ease, to thereby adjust the 3 '1 i i waterlevcl in theiwatel. t V v lh e sleeve 12 is provided with ashouleor Further objects are to provide 'a oonstruci e f y ll li l gasket 1S H tiou of'valve for a water pan or oth erliuinidi- 3 g0 tying unit so f-LSSOClfitBCl withthe water pan 1 '9 1.. g 3 and arr-aimed 'thatit is positioned above the f i yum W i l i we le'ixagfin water level" in'l' is free fi'ointh harmful efilxm'lgu of time outer of W rod 9 a shown K n S 7 9 I 4 in Figure 2, and thus provldes spaces befccts of heat and accumulation of sediment.

' ie in l 9 hi YrIi Pfl l? Sh Cal wallet theaperture through which water n the accoi npany g drawi gs i w fi may pass when'the valve is open." The outer V F gure 1 is a"side lelevatlonshowing 0 6 end of the cylindrical aperture in the bushtornrofpthe device. y i ing 19 is flared as indicated at'QO, to faciliv Figure? i s a sectional view of the valve. tateassembling of the rod. The innerend of tweenthe flat face. of the rod and the cylindri- 9 I this bushing is constructed so as to provide a bearing face 21 which bears against the outer side of the rubber gasket or valve seat 18. This rubber gasket is provided with a conical opening on the outer side to provide a valve seat for the ball valve 22. This valve is a metal ball. preferably formed of Monel metal to prevent corrosion and to keep the surface free from scale or pitting. The ball is urged towards closingposition by means of a spring 23. the spring bearing against an apertured web 2% formed in the sleeve 12.

The sleeve 12 receives at its outer end a threaded plug by means of which asmall supply pipe 26 is attached to the SlOQYG.

The other end of the pipe 26 is secured to one member 27 of a union 2S. Preferably this union connected to a val 29. The valve 29 is ordinarily left open. but during the summer months it may be closed.

The apparatus operates as follows Assuming that the valve is closed it will be seen that the valve is held closed, not only by the spring, but also by the water pressure behind the valve. \Vhen the water level within the pan 3 becomes lowered to a predetermined point, the extension 10 of the control rod unseats the valve. This extension as will be noted from Figure 2 projects loosely through the valve seat and contacts with the ball or valve although it is separate and distinct from such valve. ater is. therefore, allowed to flow past the valve. through the space between the hexagon face of the control rod 9 and the bushing 19 and through the pipe 4 into the water pan thus raising the l vel of the water. \Vhen the control rod 9 iswi-thdrawn by the mechanism. the valve seats itself independently of the rod and may, therefore, adjust itself with the utmost freedom and form a perfect seat.

This valve does not chatter, nor does it leak, ashas been found from actual practice. Further. the rubber gasket is so far removed from the furnace that it is not affected or injured by the heat from the furnace. The

beveled end of the extension 10 of the control rod aids in preventing chattering. In addi tion to this it is to be noted that an exact adjustment of the water level may be obtaincd by merely screwing the sleeve 12 into or out. of the casing thereafter locking it in place by the lock nut 13. The construction is; such that this adjustment is readily permitted. Vhen it is desiredto make the adjustment all that is necessary is to loosen the lock nut l3 and the union 2S and thereafter rotate the sleeve the desired extent, subsequently locking the washer in place. This Y of the mechanism, thus adjusting the point at which the valve will open, consequently djustmcnt of the sleeve axially of the ens-- adjusting the water level maintained in water pan.

The valve may take other forms. For example, as shown in Figure 3, a Monel metal gasket '80 may be substituted for the rubber gasket 18 and a rubber cone shaped valve 31 may be vulcanized, upon a metal pin 32 and a metal washer 33. The pin 32 is free from contact with the extension 10 of the control rod 9. These parts correspond to those previously described.

It will be seen that a novel form of valve for humidifying units has been provided by this invention, which is extremely simple, which is highly practical, which afiords access to its parts without disturbing the humidifier unit and which is easily adjusted to the. exact requirements.

Although the invention has been described in considerable detail, such description is intended as illustrative rather than limiting as the invention may be variously embodied and as the scope of such invention is to be determined as claimed.

I claim:

1. A float controlled valve comprising a discharge pipe, a float controlled rod positioned within said pipe, a bushing arranged adjacent one end of said pipe and having a cylindrical guiding aperture for said rod, 21 valve seat at the inner end of said aperture, a valve cooperating with said valve seat, a sleeve mounted in the end of said discharge pipe and carrying said bushing, said sleeve having a chamber for'liquid under pressure, said pressure chamber housing said valve, and an extension carried by said rod, separate and distinct from said valve and adapted to unseat said valve when said rod is moved inwardly.

' 2. A float controlled valve comprising a discharge pipe, a float controlled rod positioned within said pipe, a bushing arranged adjacent one end of said pipe and having a cylindrical guiding aperture, for said rod, a valve seat at the inner end of said aperture, a valve cooperating with said valve seat, a sleeve mounted in the end of said discharge pipe and carrying said bushing, said sleeve. having a chamber for liquid under pressure, said pressure chamber housing said valve, a spring located within said chamber and bearing against said. valve, and an extension carried by said rod, separate and distinct from, said valve and adapted to unseat said valve when said rod is moved inwardly.

A float controlled valve comprising a discharge pipe, a float controlled rod positioned within said pipe, a bushing arranged adjacent one end of said pipe and having a cylindrical guiding aperture for said rod,

'a valve seat at the inner end of said aperture,

a valve cooperating with said valve seat, a sleeve mounted 1n the end of said discharge pipe and carrying said bushing, said sleeve having a chamber for liquid under pressure, said pressure chamber housing said valve, and an extension carried by said rod, separate and distinct from said valve and adapted to unseat said valve When said rod is moved inwardly, said sleeve being axially adjustable With reference to said Valve. 1

Intestimony ,that I claim the foregoing I have hereunto set my hand at Green Bay, in the county of Brown and State of Wisconsin.

EMIL BUEHRER. 

